That problem has actually already been solved for at least 5 years. There are multiple solutions that do all the necessary calculations, among them: - PC Solut

That problem has actually already been solved for at least 5 years. There are multiple solutions that do all the necessary calculations, among them: - PC Solution by Matrox http://www.matrox.com/graphics/en/products/graphics_cards/m_series/powerdesk/edge_overlap/ http://www.matrox.com/graphics/en/products/graphics_cards/m_... - Hardware Solution by RGB Spectrum http://www.rgb.com/products/EdgeBlendUnit/ http://www.rgb.com/products/EdgeBlendUnit/